Printable wheel for rc cars with rim and mold for the rubber

thingiverse

a printable rim, it need rubber to work, for more sizes just ask :) Instructions Print istruction: for make best print you need the rim layer height set to 0,20mm, if bigger can have some problem with the particular geometry of the rim, set 70% or more infill for this piece because will support much stress during a race ;) for the other pieces can use 0,24 or more layer height and 40% or less infill. Once you have printed the 4 parts needed for the mold and one or more rims, yo need to remove the clogs if present in the pattern for the rubber, will come off with hands and/or with the help of a cutter, now see if the pieces fit togheter, if not, mybe you have to sand it a bit; when you have a good result veryfy with a meter the internal diameter for make sure it is a circle and not elliptic. All close togheter? Good you are ready to the next step How to mold the rubber: now you need some materials: 1)acetic silicone (the color you like) 2) cornstarch or other starch 3) colorant in powder (optional if your silicone is transparent or white) 4) carbon powder or toner (also optional if you need more friction resistence, be careful if you use toner) 5) an old container for make the misture Procedure: first put in the conteiner a bit of cornstarch, then add a (must to define for one wheel) quantity of silicone, now start to add the rest of starch slowly while amalgamate all whith a baton, continue untill the compost is handled. Then disassemble ur mold and take the rim, mold with hands the silicone compost, can use gloves for safety, and start to put on the rim, about 1cm excess the diameter of the rim, put a bit of starch on the mold parts for avoid attacks. Now support the patterns for the rabber up the compost you have depositated on the rim and press a little bit for make them fit, now install the downside of the mold and fit with little streight, then install the upside of the mold and press all with streight. The excess of material will come out the holes in the upside, now wait about 1 our before disassemble. If all is gone successfully you have make the first wheel! Repeat all with the others. If you have chose a rim whith diameter > 3mm must to use the adapters. for better details can refer here http://www.instructables.com/id/How-To-Make-Your-Own-Sugru-Substitute/ for photos can refer here http://www.facebook.com/media/set/?set=a.3711205070303.146298.1580924138&type=1&l=3367fdc765update: the base of the mold must be modified, is better to make a hole in the center, and use a shaft to center the rim, i'll upload soon the new piece, if you have printed it remove the plastic shaft and make a hole with dremel; the hole position must be canged from up to sides due to favorite the use of clamps to press enough the material in